Diaphragm-actuating means.



G. A. INMAN.

DIAPHRAGM ACTUATING MEANS.

APPLICATION FILED 1AN.4. l9l5.

Patented Nov. 9, 1915.

COLUMBIA PLANOGRAPH CD.,WASHINGTON, D c.

GEORGE A. INMAN, or raovrnnncn, nnona ISLAND.

DIAPHRAGM-AGTUATING MEANS.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed January 4. 1915. Serial No. 2:96.

To all whom it may concern Be it known that I, GEORGE A. INMAN, citizen of the 1 United v States, residing at Providence, in the county of Providence and State of Rhode Island, have invented new and useful Improvements in Diaphragm- Actuating Means, of which the following is a specification.

My present invention pertains to flexiblediaphragms and diaphragm-actuating means for paper-pulp screens; and it contemplates the provision of a construction calculated to reduce to a minimum the wear of the costly diaphragms and this while increasing the suction and consequently the capacity of the machines.

The invention also contemplates the pro vision of improved means for actuating and controlling the plunger of the diaphragmactuating means, with a view to rendering the plunger steady in its movements by eliminating undue vibration.

Other advantageous characteristics of the invention will be fully understood from the following description and claims when the same are read in connection with the drawings, accompanying and forming part of this specification, in which:

Figure 1 is a view showing my improved construction as properly arranged relative to the flexible diaphragm of a paper-pulp machine, with which the construction is connected and combined. Fig. 2 is a plan of the top plate. Fig. 3 is a detail cross-section showing the relative arrangement of the plunger head, the diaphragm and the top plate. Fig. 4 is a fragmentary elevation of the actuating cam, taken at a right angle to Fig. 1.

Similar numerals designate corresponding parts in all of the views of the drawings, referring to which:

1 is the conventional diaphragm of a paper-pulp machine, connected with and we tending between frame beams 2 in the ordinary or any other approved manner.

In furtherance of my invention a plunger 3 is arranged in upright position below the diaphragm 1. The said plunger is provided at its lower end with an enlarged forkshaped portion 4 which affords shoulders 5 for a purpose hereinafter set forth. In the fork-shaped portion 4 is a roller 6, preferably of chilled steel, that bears on an eccentric plunger-raising cam 7. The said cam may be arranged as shown or in any other manner compatible with the purpose of my invention without departure from the scope of the same as claimed.

At its upper end. the plunger 3 is pro videdwith a flat, horizontallv-disposed diainond-shaped head 8, of approximately the proportional size illustrated. The said head is arranged immediately below the diaphragm 1 at and adjacent to the center thereof, and is connected through bolts 9 with a correspondingly shaped flat plate 10 which is superimposed on the diaphragm and is arranged so that its edges are flush with those of the head 8. This construction reinforces, protects and strengthens the diaphragm and practically eliminates wear thereof which is important because of the considerable cost of such diaphragms. Also because of the shape of the head 8 and plate 9 and the arrangement of the same relative to the diaphragm 1, the suction created by operation of the diaphragm is materially increased as is also the capacity of the machine considered as a whole. a

With a view to preventing undue vibration of the plunger as well as to hold the same to the cam 7 or other operating element, I provide the stays 11, Fig. 1. These stays respectively comprise a coiled spring 12 that bears against one of the shoulders 5 and also against an abutment 13 on a lower rod section 14, an upper rod section 15 connected with one beam 2, and a turn-buckle 16 that connects the rod sections 14 and 15. It will be apparent that springs 12 will hold the roller 6 under yielding pressure against the cam 7, and that on the upward stroke of the plunger 3 said springs will be compressed, with the result that they will assist the subsequent downward movement of the plunger. From this it follows that the stays including the springs will prevent undue vibration. and will assure smooth and even operation thereof.

Having described my invention, what I claim and desire to secure by Letters-Patent, is:

1. In a paper-pulp machine, the combination. of a diaphragm, a plunger having a flat, diamond-shaped head disposed immediately below the diaphragm, and a diamondshaped plate arranged on the diaphragm and connected with the same and the head of the plunger and having its edges flush with those of the plunger.

:2. In a paper-pulp machine, the combination of a diaphragm, a plunger having a fiat, diamond-shaped head disposed immediately below the diaphragm, a diamondshaped plate arranged on the diaphragm and connected thereto and to the head of the plunger and having its edges flush with those of the plunger, means for raising the plunger, a frame carrying the diaphragm, and stays interposed between the plunger and the frame and including springs for moving the plunger downwardly.

3. In a paper-pulp machine, the frame, the diaphragm, the plunger having a head disposed below and against the diaphragm and also having a fork-shaped lower por- Copies of this patent may be obtained for nesses.

tion afi'ording shoulders, a roller mounted 1n S 2l1(ll portlon, a plunger-raising cam engaging said roller; a plate arranged on the GEORGE A. INMAN.

Witnesses: V

CLARA E. vVATERMAN, GRAcnA. GARDINER.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0.?

subscribing wit- 2 5 

